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Contaminant detection in the petrochemical industry

Plastics are an important product in the petrochemical industry – and quality is a key factor for success. Our contaminant detectors and separators ensure metal-free granules and satisfied customers.

Sesotec specialises in systems for industrial contaminant detection and has more than 40 years of experience in the plastics industry.

We provide a complete range of leading technology that includes metal detectors and magnet systems for the reliable detection and removal of contaminants in a wide variety of applications. Our systems can target ferrous metals, stainless steel and non-ferrous metals, such as aluminium, copper or brass − regardless of whether the metals are magnetic or not, coated, painted, loose or embedded in material.

Sesotec's strengths
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over 40 years of experience and reliability

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Personal support in the after-sales area

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Service-Hotline

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Long-term reliability for spare part supply

FAQ

 

Why is contaminant detection and removal important in the petrochemical industry?

When it comes to producing plastics – one of the most important areas in the petrochemical industry – product purity is a key quality factor. It is necessary above all to eliminate metal pieces and particles, which could otherwise cause damage to machinery when the plastic is processed and create quality issues. As a result, manufacturers of plastics should use machine-based contaminant detectors. It is the only way they can ensure their ability to consistently deliver granules of perfect quality.

 

What kinds of contaminants could appear?

Metals such as iron, stainless steel and copper very often contaminate plastics. There is a wide range of reasons for this, including:

  • Slough and wear from conveyor lines (pipes)
  • Slough and wear from machines
  • Broken blades during hot or cold die-face pelletising
  • Accidental contamination through openings in silos, for example due to staff losing objects

Where do plastics manufacturers use our machines?

It varies. Some manufacturers inspect the granules during production, while others do so after the granules have passed through a screening machine. Yet other manufacturers use our machines to perform a quality check during the outgoing goods phase, for example directly before filling the granules into big bags, octabins or other similar containers. Contact us – together, we will find the right solution for the set-up of your processes.

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White Paper

Keeping plastic compounds free of metallic contaminants

The Whitepaper explores the challenges that metal contamination poses to compounding and masterbatch production and considers the key features that metal separators must have to provide an adequate solution.

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White Paper

The circular economy: Challenges and opportunities for Recyclers and plastics processors

The plastics industry is under pressure. Between climate change, excessive consumption of finite resources, and vast amounts of plastic waste in the world’s oceans, plastics are coming to be seen in a different light by politicians, businesses, and consumers alike. Read in our e-book about the most important factors of a functioning circular economy, especially which challenges and opportunities exist for recyclers and plastics processors.

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White Paper

Using recycled materials in plastics processing

In the new Sesotec White Paper "Using recycled materials in plastics processing" you will learn about

  • … why there is increasing pressure on plastics processors to use more recyclate
  • … the differences between post-consumer and post-industrial recyclate
  • … the problems plastics processors may face when using recyclate
  • … how to future-proof your processes to effectively handle increasing volumes of recyclate

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For decades Brückner has been relying on Sesotec metal separators
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Separately purchased recyclate often contains various different polymers as well as metal contaminants such as aluminum, brass, and stainless steel. Learn in our Case Study how Sitraplas has solved this problem.

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Case Studies

OPC UA for production without machine downtime

SITRAPLAS GmbH is a producer of high-performance engineering plastic compounds. Unplanned downtime is a nightmare for every company, but especially for continuous production facilities. When metal separators are networked with plastic processing machines, the flow of information between machines can be monitored.

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To avoid any metal in the powder, CIPSA wanted to inspect the PVC compounds before they enter the pelletizer. This was to protect the extruder screw from damage and avoid expensive production stops.

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How a metal separator saved this plastics manufacturer 75% in maintenance costs and increased output by 20%

While processing virgin glass-filled material together with regrind, the same problem was coming up up over and over again. Metal inclusions were clogging the hot runners of the molds, leading to as many as 10 emergency stops and 2 to 3 costly repairs per month. After careful consideration of the production environment and manufacturing specifications, the metal detection system PROTECTOR 40 was installed along with the magnet system SAFEMAG at the feed hopper of the injection molding machine.

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Case Studies

Product purity for chemical products through precise quality control

The quality requirements of the chemical industry are particularly high. Metal detectors play an essential role in the refinement of solids to ensure a consistently high product quality and safety. At the same time, the customers expect quick setup times to achieve high flexibility and efficiency.

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Industry Brochures

Economy meets Ecology

Sorting and Detection systems for every stage of the Circular Economy in the plastics industry.

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Product Brochures

RAPID VARIO-FS

Metall-Separator für Freifallanwendungen mit drehbarer Separationseinheit

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RAPID PRO-SENSE

Hochleistungs-Metall-Separator für Freifallanwendungen

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Product Brochures

RAPID DUAL

Metal separator for free-fall applications

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RAPID 4000

Metal separator for free-fall applications

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Metall-Separator für pneumatische Förderleitungen

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ELS

Plate type metal detector for installation in conveyor belts and material chutes

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C-SCAN DLS

Splitable metal detector for installation on conveyor belts and material chutes

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ELCON

Flächen-Metalldetektor zum Einbau in Förderbänder und Materialrutschen

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Product Brochures

UNICON+

Metall-Detektionssystem für Förderbandanwendungen

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VARICON+

Conveyor based Metal detection systems

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VARICON COMPACT

Kompaktes Metall-Detektionssystem mit Förderband zur Untersuchung von Stückgütern

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MAGBOX PLAST

Rohr-Magnet für Freifallanwendungen

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Product Brochures

EXTRACTOR

Rohr-Magnet für Spritzgießmaschinen, Extruder und Blasformmaschinen

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Product Brochures

FLAKE SCAN

Analyzing system for the plastics industry

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Product Brochures

RE-SORT

Mobile metal separation unit for material recovery

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